Spotted Snakehead
Channa punctata is a very commonly seen fish among the fresh water habitats of the wet zone lowlands of Sri Lanka. I'm not sure about its availability in other parts of the island. The biggest I've seen of these is about 3-3 inches in length, though there is online information suggestive of adult Spotted Snakehead fish growing much bigger than that. I've observed these fish to be very vicious predators. When I was a kid, I once accidentally put a live Spotted Snakehead together with some kind of a fresh water insect in a jam jar full of water. Soon after the fish spotted the bug swimming around, the bug found its way into the fish's system with in a shockingly short time!
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